For the sauce mash tomatoes. Peel the onions. Dice 1 onion, cut the rest into rings. Peel and chop the garlic
Heat the oil in a pot. Sauté onion cubes and garlic in it. Sprinkle with sugar and melt briefly. Stir in mustard and marjoram. Deglaze with the pureed tomatoes, bring to the boil. Simmer for about 5 minutes. Season the sauce with salt, pepper, paprika, Worcester sauce and Tabasco
Wash the meat and pat dry. Season with salt and pepper. In a roasting pan, alternate layers of meat, bacon and half of the onion rings. Pour about half of the sauce over them. Sprinkle the rest of the onion rings on top. Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for about 1 1/2 hours. Garnish if necessary. The rest of the sauce is extra. Served with: fresh country bread